<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			function doSomething(a){
				console.log(a, '111')
				console.log(doSoemthingElse(a * 2))
				b = a + doSoemthingElse(a * 2);
				console.log(a,b)
				console.log(b * 3);
			}
			function doSoemthingElse(a){
				return a - 1;
			}
			var b;
			doSomething(2); //输出啥
		</script>
	</body>
</html>
